53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
#pragma once
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#ifndef MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_BLOBONBLOCKS_H_
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#define MESSMER_BLOBSTORE_IMPLEMENTATIONS_ONBLOCKS_BLOBONBLOCKS_H_
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#include "../../interface/Blob.h"
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#include <memory>
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#include <boost/optional.hpp>
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namespace blobstore {
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namespace onblocks {
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namespace datanodestore {
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class DataLeafNode;
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}
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namespace parallelaccessdatatreestore {
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class DataTreeRef;
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}
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class BlobOnBlocks final: public Blob {
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public:
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BlobOnBlocks(cpputils::unique_ref<parallelaccessdatatreestore::DataTreeRef> datatree);
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~BlobOnBlocks();
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const blockstore::Key &key() const override;
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uint64_t size() const override;
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void resize(uint64_t numBytes) override;
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cpputils::Data readAll() const override;
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void read(void *target, uint64_t offset, uint64_t size) const override;
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uint64_t tryRead(void *target, uint64_t offset, uint64_t size) const override;
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void write(const void *source, uint64_t offset, uint64_t size) override;
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void flush() override;
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cpputils::unique_ref<parallelaccessdatatreestore::DataTreeRef> releaseTree();
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private:
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void _read(void *target, uint64_t offset, uint64_t count) const;
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void traverseLeaves(uint64_t offsetBytes, uint64_t sizeBytes, std::function<void (uint64_t, datanodestore::DataLeafNode *, uint32_t, uint32_t)>) const;
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cpputils::unique_ref<parallelaccessdatatreestore::DataTreeRef> _datatree;
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mutable boost::optional<uint64_t> _sizeCache;
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DISALLOW_COPY_AND_ASSIGN(BlobOnBlocks);
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};
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}
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}
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#endif
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